[Bug 203905] New: amdgpu:actual_brightness has unreal/wrong value

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=203905

            Bug ID: 203905
           Summary: amdgpu:actual_brightness has unreal/wrong value
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.1.9
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: bjo at nord-west.org
        Regression: No

Radeon R5/R6/R7 Graphics in a Thinkpad A275 has wrong values on
actual_brightness of amdgpu_bl0. While max_brightness is 255 and it can be set
to 255, actual_brightness reports a 5 digit number like 12470. As a result,
tools which want to change the brightness related to actual_brightness fail, as
brightness does not accept any 5 digit number,

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